Coffee-mill



Patehted De'c ..27, uses.

No. 6l6,6l4.

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COFFEE MILL (Application filed Jan. 20, 1897.)

2 Sheets-sheaf].

(No Model.)

WIT N ESS ES A mmwmmummww D c UNTTED STATES PATENT OFFICE.

MATTHEIV GRISIVOLD, JR,

()F ERIE, PENNSYLVANIA.

COFFEE-MILL.

SPECIFICATION forming part of Letters Patent No. 616,614, dated December27, 1898.

Application filed January 20, 1897- Serial No. 619,890- (No model.)

To to whom it may concern.-

Be it known that I, MATTHEW GRIswoLD, Jr., a citizen of the UnitedStates, residing at the city of Erie, in the county of Erie and State ofPennsylvania, have invented certain new and useful Improvements inCoffee-Mills; and I do hereby declare the following to be a full, clear,and exact description of. the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, forming part of this specification.

This invention relates to improvements in coffee-mills; and it consistsin the improvements hereinafter set forth and explained, and illustratedin the accompanying drawings, in which- Figure l is a vertical sectionof my improved coifee-mill. Fig. 2 is a perspective view of thestationary conical grinding-shell. Fig. 3 is a like view of the rotatinggrindingcone operating within the shell. Fig. 4 is a perspective view ofthe shaft upon which the grinding-cone is mounted. Fig. 5 is a top orplan view of the ground-coffee receptacle detached from the mill. Fig. 6is a vertical section similar to Fig. 1 and showing a part of the mill,but drawn to a larger scale.

In the construction of my invention shown in the accompanying drawings,A is the millcase, provided with arms A, by means whereof it may beattached to any suitable vertical support in the usual manner.

The upper part of the mill-case A is preferably made semiglobular tooperate as a receptacle for the coffee to be ground, and is providedwith a semicircular cover a, adapted to be swung around on a centralstud a.

The lower part of the mill-case A consists of a downward projection theback side B of which is vertical and is provided with a shaftbearing Z2and extends in a direct line downward below the grinding mechanism,hereinafter described. The front side B thereof extends downward,parallel to B, to a point below the shaft-bearing 11 therein, from whichpoint it inclines sharply toward the back B, leaving between them at thelower end of the case a small opening 6 for the discharge of the groundcoffee from the grinding apparatus. This construction forms a verticalchamber between the sides B and B, the sides of the upper part of whichare parallel and oneside of the lower part inclined, the side B forminga support forv the back of the conical grinding-shell C, Fig. 2, whichhas a projection 0 on the upper part of the back thereof, and is adaptedto be dropped into place from the upper part of the mill-case A. Withinthis grinding-shell O a rotating grinding-cone D, Fig. 3, operates,supported on a shaft E, Fig. 4, the rear end 6 of which operates in thebearing 1). On this shaft is a squared portion 6, which fits into asquare hole d in the center of the grinding-cone D, while the roundportion (2 of the shaft E passes through the opening 0 in thegrinding-shell (J, through which the coffee-beans drop from the hopperinto the space between the disks and into the bearing 11, by which it issupported. The squared portion e receives a crank F, adapted to rotatethe shaft E and the grinding-cone D, mounted thereon, and for adjustingthe grinding-cone D toward the grinding-shell C an adjusting-nut G isput upon the screwthreaded end of the shaft E, which contacts with theouter face of the crank-hub f, the I rear face of which contacts withthe end of the bearing 1). A lock-nut g is also provided for retainingthe adjusting-nut g in place. It will be observed that this constructionprovides a bearing for both ends of the shaft E and at the same timeenables me to remove the shaft and take out the grinding-shell andgrinding-cone at will and replace any of these parts with new ones, ifdesired, without taking the mill-case apart or otherwise disturbing it.

The handle F and the cone D are practically splined to the shaft E, asthey are free to slide longitudinally on it and are constrained torevolve with it.

To the lower end of the back B of the lower part of the mill-case A, Isecure a circular disk 11 by means of a vertical lug H thereon, throughwhich a screw h passes, and adjacent to which there is an opening h,which coincides with the opening b in the lower end of the mill-case.Around one-half of this disk II there is a downwardly-projecting flangeI, provided on its lower edge with an inwardlyprojecting annular lip 1,adapted to engage and hold one-half of an annular flange J on the upperend of a glass cup K, and the remainder of the circumference of the diskH is provided with an arm L, hinged thereto at Z and shaped to conformwith the periphery of the disk H. This arm L is provided with a groove Zon the inside face thereof, adapted to close over the edge of the disk Hand around and under the flange J on the glass cup K, so that whenclosed the glass cup K is held firmly up under the disk H, which thenoperates as a closed case therefor.

For securing the free end of the arm L it is provided with a spring-dogM, adapted to spring over and engage a catch m on the periphery of theflange I, so as to hold the arm L firmly in a closed position, but whichis adapted to be readily detached when it is desired to remove the glasscup K from the disk H. This glass cup K, I preferably graduate by meansof marks is thereon, designating the amount of ground coffee ordinarilyrequired to make a given number of cups of coffee, so that the operatoris thereby enabled to grind exactly the amount of coffee required tomake the number of cups of coffee desired.

Having thus fully described my invention, so as to enable others toconstruct and use the same, what I claim as new, and desire to secure byLetters Patent of the United States, 1s

1. In a coffee-mill, the combination, with a case having bearings ofdifferent diameters on its sides, of a removable grinding-disk supportedbetween the said sides and provided with a hole in its upper side forthe beans to drop through, a shaft journaled in the said bearings, saidshaft being withdrawable through the larger of the said bearings andprovided with a screw-threaded portion at its smaller end, a revolublegrinding-disk operatively connected to the larger part of the said shaftbet-ween the sides of the case, a handle operatively connected to thesmaller part of the said shaft outside the case, and a nut engaging withthe screw-threaded portion of the said shaft and operating to adjust thedistance between the said grinding-disks and to secure the said handle,substantially as set forth. 7

2. In a coffee-mill, the combination, with a case having sides B Bprovided respectively with bearings b b, an inclined portion at thelower part of the side B and an outlet-opening at its bottom; of astationary grindingdisk dropped between the said sides and resting onthe said inclined portion and provided with a hole in its upper side forthe coffeebeans to drop through; a shaft provided with journals ofdifferent diameters journaled in the bearings b b, said shaft beingwithdrawable through the larger bearin g b and having as crew-threadedportion at its smaller end; a revoluble grindingdisk operativelyconnected to the larger part of the said shaft between the said sides ofthe case; a handle operatively connected to the smaller part of the saidshaft outside the case, and nuts engaging with the screw-threadedportion of the said shaft and operating to adjust the distance betweenthe grinding-disks and to secu re the said handle,substantially as setforth. In testimony whereof I affix my signature in presence of twowitnesses.

MATTHEW GRISWOLD, JR. lVitnesses: Y

H. J. CURTZE, CHARLES A. MER'rENs.

